/*
 * Created on 15 Jan 2008
 * Created by Allan Crooks
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package com.aelitis.azureus.core.peermanager.messaging.bittorrent;

import org.gudy.azureus2.core3.util.DirectByteBuffer;
import org.gudy.azureus2.core3.util.DirectByteBufferPool;

import com.aelitis.azureus.core.peermanager.messaging.Message;
import com.aelitis.azureus.core.peermanager.messaging.MessageException;

/**
 * @author Allan Crooks
 * 
 */
public class BTDHTPort implements BTMessage {

    private int port;
    private DirectByteBuffer buffer;

    public BTDHTPort(int port) {
        this.port = port;
    }

    public Message deserialize(DirectByteBuffer data, byte version) throws MessageException {
        if (data == null)
            throw new MessageException("[" + getID() + "] decode error: data == null");
        if (data.remaining(DirectByteBuffer.SS_MSG) != 2)
            throw new MessageException("[" + getID() + "] decode error: payload.remaining[" + data.remaining(DirectByteBuffer.SS_MSG) + "] != 2");
        short s_port = data.getShort(DirectByteBuffer.SS_MSG);
        data.returnToPool();
        return new BTDHTPort(0xFFFF & s_port);
    }

    public DirectByteBuffer[] getData() {
        if (buffer == null) {
            buffer = DirectByteBufferPool.getBuffer(DirectByteBuffer.AL_MSG_BT_DHT_PORT, 2);
            short s_port = (short) port;
            buffer.put(DirectByteBuffer.SS_MSG, (byte) (s_port >> 8));
            buffer.put(DirectByteBuffer.SS_MSG, (byte) (s_port & 0xff));
            buffer.flip(DirectByteBuffer.SS_MSG);
        }
        return new DirectByteBuffer[] { buffer };
    }

    public String getDescription() {
        return getID() + " (port " + port + ")";
    }

    public void destroy() {
        if (buffer != null) {
            buffer.returnToPool();
        }
    }

    public String getFeatureID() {
        return BTMessage.BT_FEATURE_ID;
    }

    public int getFeatureSubID() {
        return BTMessage.SUBID_BT_DHT_PORT;
    }

    public String getID() {
        return BTMessage.ID_BT_DHT_PORT;
    }

    public byte[] getIDBytes() {
        return BTMessage.ID_BT_DHT_PORT_BYTES;
    }

    public int getType() {
        return Message.TYPE_PROTOCOL_PAYLOAD;
    }

    public byte getVersion() {
        return (byte) 1;
    }

    public int getDHTPort() {
        return port;
    }

}
